Sewing machine



FIG. 1 is a perspective view of sewing machine showing my new design;

FIG. 2 is an enlarged partial view of FIG. 1:

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is an enlarged partial right side view of FIG. 1;

FIG. 5 is a front view of FIG. 1; and,

FIG. 6 is an enlarged partial front view of FIG. 1.

The broken lines shown in the drawing disclosure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a sewing machine, as shown and described. 